San Francisco 49ers linebacker Fred Warner has been activated from the reserve/COVID-19 list.

Warner was placed on the list, which is for players who have either tested positive for the virus or have come into contact with a person who has contracted COVID-19, on August 31.

His activation means Warner should be available to play in the 49ers' season opener against the Arizona Cardinals on Sunday.

A third-round pick in 2018, Warner was a crucial part of the 49ers' second-ranked defense last season.

He finished the regular season with 118 tackles, three sacks, three forced fumbles and an interception returned for a touchdown as the 49ers topped the NFC with a 13-3 record.

San Francisco progressed to Super Bowl LIV, where Warner intercepted Patrick Mahomes in the 49ers' 31-20 defeat to the Kansas City Chiefs in February.